[ubuntu] Should I use AMD or OpenGL drivers?

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http://ubuntuforums.org – I just installed a HIS AMD Radeon HD 6670 graphics card. I'm currently using Ubuntu 12.04 but am willing to upgrade if there's reason to. I'm not a gamer, but I do like to play an occasional game and I was not happy with the graphics performance of many games under WINE. My old card was an AMD Radeon x1550, and even their legacy drivers could not be installed (the installation script said it was incompatible with Linux kernels more recent than... I don't remember now, several kernels ago). I've been happy with the open source drivers that come with Ubuntu, but found I couldn't get the resoluti (Hardware)